Klindar: I used Paintshop for years before obtaining Photoshop and now have both. The interfaces are similar and in many important respects Paintshop is the better product with the icing on the cake being you can sometimes get a license for as little as $29 compared to the $900 Adobe soaks you for with Creative Suite. Adobes upgrades alone cost more than a whole new license for Paintshop and IMO the value is poor when you consider what Paintshop does.
I bought Photoshop when it became apparent Corel were dragging their feet in regard to Paintshop fully supporting 48 bit images and supporting only 32 bit plug-ins (these are Photoshop compatible, BTW). I would also prefer that Paintshop be a true 64 bit piece of code as that is the way the world has gone. No matter for now as Windows runs all this legacy stuff to perfection.
"Enhanced! 16-bit supportEnjoy greater precision and flexibility with extended 16-bit support for over 20 tools and adjustments—including Scratch Remover, Paint Brush, Object Remover, Color Replacer, Warp Brush, Mesh Warp, Background Eraser and more!"
At least they are working towards full 16bit image support.